2020ApJ...894..135S

Query : 2020ApJ...894..135S

2020ApJ...894..135S - Astrophys. J., 894, 135-135 (2020/May-2)

The Isaac Newton Telescope monitoring survey of Local Group dwarf galaxies. I. Survey overview And first results for Andromeda I.

SAREMI E., JAVADI A., VAN LOON J.T., KHOSROSHAHI H., MOLAEINEZHAD A., McDONALD I., RAOUF M., DANESH A., BAMBER J.R., SHORT P., SUAREZ-ANDRES L., CLAVERO R. and GOZALIASL G.

Abstract (from CDS):

An optical monitoring survey in nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. Fifty-five dwarf galaxies and four isolated globular clusters in the Local Group were observed with the Wide Field Camera. The main aims of this survey are to identify the most evolved asymptotic giant branch (AGB) stars and red supergiants at the end-point of their evolution based on their pulsational instability, use their distribution over luminosity to reconstruct the star formation history, quantify the dust production and mass loss from modeling the multiwavelength spectral energy distributions (SEDs), and relate this to luminosity and radius variations. In this first of a series of papers, we present the methodology of the variability survey and describe the photometric catalog of the Andromeda I (And I) dwarf galaxy as an example of the survey, and we discuss the identified long period variable (LPV) stars. We detected 5581 stars and identified 59 LPV candidates within two half-light radii of the center of And I. The amplitudes of these candidates range from 0.2 to 3 mag in the i-band. Seventy-five percent of detected sources and 98% of LPV candidates are detected at mid-infrared wavelengths. We show evidence for the presence of dust-producing AGB stars in this galaxy including five extreme AGB (x-AGB) stars, and we model some of their SEDs. A distance modulus of 24.41 mag for And I was determined based on the tip of the red giant branch. Also, a half-light radius of 3.'2 ± 0.'3 was calculated.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Asymptotic giant branch stars - Local Group - Stellar mass loss - Stellar evolution - Luminosity function - Stellar mass functions - Stellar oscillations - Galaxy stellar content - Dwarf galaxies - Surveys - Long period variable stars - Galaxy distances

VizieR on-line data: <Available at CDS (J/ApJ/894/135): table1.dat table2.dat>

CDS comments: Figures 9 and 10: variable stars are not in SIMBAD.

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 0
3 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
4 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
5 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
6 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
7 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
8 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
9 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
10 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
11 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
12 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
13 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
14 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
15 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
16 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
17 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
18 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
19 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
20 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
21 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
22 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
23 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
24 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
25 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
26 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
27 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
28 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
29 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
30 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
31 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
32 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
33 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
34 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
35 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
36 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
37 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 354 1
38 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
39 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
40 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
41 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
42 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
43 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
44 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
45 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
46 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 379 1
47 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
48 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
49 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
50 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
51 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
52 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
53 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
54 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
55 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
56 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
57 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
58 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
59 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
60 NAME Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 75 0
61 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
62 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
63 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
64 NAME Peg dSph GiG 23 51 46.3 +24 34 57   14.5 13.2     ~ 250 2
65 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
66 NAME Local Group GrG ~ ~           ~ 9325 0

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